diff --git a/nettle-internal.h b/nettle-internal.h
index 97b15e07c3e40798dc009ddab6f10bb6ce134c9e..df49f10a8ad7966acb50dff0e7758e7730cdc9b5 100644
--- a/nettle-internal.h
+++ b/nettle-internal.h
@@ -71,4 +71,7 @@ extern const struct nettle_cipher nettle_openssl_blowfish128;
 extern const struct nettle_cipher nettle_openssl_des;
 extern const struct nettle_cipher nettle_openssl_cast128;
 
+extern const struct nettle_hash nettle_openssl_md5;
+extern const struct nettle_hash nettle_openssl_sha1;
+
 #endif /* NETTLE_INTERNAL_H_INCLUDED */